Modifiers matching barrier:

• physical,
• animal,
• solid,
• geological,
• impermeable,
• penetrating,
• typical,
• protective,
• artificial,
• endothelial,
• thin,
• visual,
• flexible,
• visible,
• horizontal,
• fixed,
• mechanical,
• linear,
• disposable,
• resistant,
• removable,
• surrounding,
• under,
• continuous,
• larger,
• technical,
• chemical,
• permanent,
• natural,
• minor,
• over,
• moveable,
• nonmetallic,
• molecular,
• regulatory,
• low,
• exterior,
• vertical,
• metallic,
• durable,
• residential,
• moving,
• institutional,
• thick,
• permeable,
• outdoor,
• mobile,
• confining,
• conventional,
• secure,
• effective,
• symbolic,
• porous,
• logical,
• concrete,
• hard,
• multiple,
• new,
• reliable,
• defined,
• conductive,
• home,
• small,
• external,
• opaque,
• structural,
• hydraulic,
• erect,
• suitable,
• basic,
• physiological,
• impenetrable,
• accessible,
• architectural,
• passive,
• rigid,
• level,
• positive,
• behavioural,
• high,
• immovable,
• significant,
• light,
• environmental,
• stable,
• nonstructural,
• normal,
• static,
• old,
• up,
• upright,
• temporary,
• simple,
• coastal,
• real,
• major,

Simple categories matching effective:

• medicine,
• gear,
• medium,
• movement,
• measure,
• metal,
• communication,
• document,
• constituent,
• antibiotic,
• substance,
• property,
• anxiolytic,
• treatment,
• theory,
• means,
• engagement,
• process,
• response,
• bactericide,
• improvement,
• contraceptive,
• weapon,
• remedy,
• practice,
• chemical,
• event,
• drug,
• action,
• gun,
• service,
• method,
• motivation,
• use,
• exercise,
• way,
• item,
• license,
• therapy,
• presentation,
• ingredient,
• ministry,
• group,
• component,
• meeting,
• part,
• leadership,
• care,
• area,
• antipsychotic,
• information,
• arms,
• control,
• implementation,
• compound,
• intervention,
• program,
• barrier,
• material,
• psychotherapy,
• pharmaceutical,
• communications,
• writing,
• agent,
• activity,
• microbe,
• medication,
• system,
• instruction,
• modality,
• nutrient,
• ship,
• message,
• structure,
• skill,
• procedure,
• neuroleptic,
• dose,